{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2025-22109 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-22109 is a high-severity memory corruption vulnerability in Linux kernel, published on 16 Apr 2025. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-22109 and fix it if it is affected.\n\nWhat it is: CVE-2025-22109 is a high-severity memory corruption vulnerability in Linux kernel, published on 16 Apr 2025. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2025-22109 in the wild and no public exploit code.\n\nAffected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2025-22109/ (Markdown: https://insights.sbomify.com/CVE-2025-22109/index.md)","id":"CVE-2025-22109","markdown":"https://insights.sbomify.com/CVE-2025-22109/index.md","name":"CVE-2025-22109","record":{"aliases":["AZL-62531","AZL-69599","BELL-CVE-2025-22109","DEBIAN-CVE-2025-22109","GHSA-rgvr-pr7c-x97v","ROOT-OS-DEBIAN-11-CVE-2025-22109","ROOT-OS-DEBIAN-12-CVE-2025-22109","ROOT-OS-DEBIAN-13-CVE-2025-22109","ROOT-OS-UBUNTU-2204-CVE-2025-22109","ROOT-OS-UBUNTU-2404-CVE-2025-22109","UBUNTU-CVE-2025-22109"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel AX.25","requires_auth":"low_privilege","summary":"A memory leak and refcount issue in the Linux kernel AX.25 autobind feature allows local attackers to cause a denial of service.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-401","name":"Missing Release of Memory after Effective Lifetime"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nax25: Remove broken autobind\n\nBinding AX25 socket by using the autobind feature leads to memory leaks\nin ax25_connect() and also refcount leaks in ax25_release(). Memory\nleak was detected with kmemleak:\n\n================================================================\nunreferenced object 0xffff8880253cd680 (size 96):\nbacktrace:\n__kmalloc_node_track_caller_noprof (./include/linux/kmemleak.h:43)\nkmemdup_noprof (mm/util.c:136)\nax25_rt_autobind (net/ax25/ax25_route.c:428)\nax25_connect (net/ax25/af_ax25.c:1282)\n__sys_connect_file (net/socket.c:2045)\n__sys_connect (net/socket.c:2064)\n__x64_sys_connect (net/socket.c:2067)\ndo_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)\nentry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\n================================================================\n\nWhen socket is bound, refcounts must be incremented the way it is done\nin ax25_bind() and ax25_setsockopt() (SO_BINDTODEVICE). In case of\nautobind, the refcounts are not incremented.\n\nThis bug leads to the following issue reported by Syzkaller:\n\n================================================================\nax25_connect(): syz-executor318 uses autobind, please contact jreuter@yaina.de\n------------[ cut here ]------------\nrefcount_t: decrement hit 0; leaking memory.\nWARNING: CPU: 0 PID: 5317 at lib/refcount.c:31 refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31\nModules linked in:\nCPU: 0 UID: 0 PID: 5317 Comm: syz-executor318 Not tainted 6.14.0-rc4-syzkaller-00278-gece144f151ac #0\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014\nRIP: 0010:refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31\n...\nCall Trace:\n \u003cTASK\u003e\n __refcount_dec include/linux/refcount.h:336 [inline]\n refcount_dec include/linux/refcount.h:351 [inline]\n ref_tracker_free+0x6af/0x7e0 lib/ref_tracker.c:236\n netdev_tracker_free include/linux/netdevice.h:4302 [inline]\n netdev_put include/linux/netdevice.h:4319 [inline]\n ax25_release+0x368/0x960 net/ax25/af_ax25.c:1080\n __sock_release net/socket.c:647 [inline]\n sock_close+0xbc/0x240 net/socket.c:1398\n __fput+0x3e9/0x9f0 fs/file_table.c:464\n __do_sys_close fs/open.c:1580 [inline]\n __se_sys_close fs/open.c:1565 [inline]\n __x64_sys_close+0x7f/0x110 fs/open.c:1565\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n ...\n \u003c/TASK\u003e\n================================================================\n\nConsidering the issues above and the comments left in the code that say:\n\"check if we can remove this feature. It is broken.\"; \"autobinding in this\nmay or may not work\"; - it is better to completely remove this feature than\nto fix it because it is broken and leads to various kinds of memory bugs.\n\nNow calling connect() without first binding socket will result in an\nerror (-EINVAL). Userspace software that relies on the autobind feature\nmight get broken. However, this feature does not seem widely used with\nthis specific driver as it was not reliable at any point of time, and it\nis already broken anyway. E.g. ax25-tools and ax25-apps packages for\npopular distributions do not use the autobind feature for AF_AX25.\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"ax25: Remove broken autobind","id":"CVE-2025-22109","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"memory_corruption","year":"2025"},"n_packages":0,"n_references":4,"next":{"headline":"netfilter: nfnetlink_queue: Initialize ctx to avoid memory allocation error","id":"CVE-2025-22110"},"packages":[],"prev":{"headline":"bnxt_en: Mask the bd_cnt field in the TX BD properly","id":"CVE-2025-22108"},"products":["Linux"],"published":"2025-04-16","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-21","vendors":["Linux"]},"summary":"A memory leak and refcount issue in the Linux kernel AX.25 autobind feature allows local attackers to cause a denial of service.","url":"https://insights.sbomify.com/CVE-2025-22109/"}